Groups > alt.folklore.computers > #150754

Re: seveneves

From	Michael Black <et472@ncf.ca>
Newsgroups	alt.folklore.computers
Subject	Re: seveneves
Date	2015-08-29 09:32 -0400
Organization	National Capital Freenet, Ottawa, Ontario, Canada
Message-ID	<alpine.LNX.2.02.1508290928310.26988@darkstar.example.org> (permalink)
References	(2 earlier) <mrilvh$ifd$1@dont-email.me> <alpine.LNX.2.02.1508260207520.20182@darkstar.example.org> <20150827.0742.971060snz@twoplaces.co.uk> <slrnmtuof5.29o.mausg@dmaus.org> <8aa48b62-954e-4d85-9101-e6f4e2d6d762@googlegroups.com>

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On Fri, 28 Aug 2015, Quadibloc wrote:

> On Thursday, August 27, 2015 at 2:20:03 PM UTC-6, Greymaus wrote:
>
>> There is a lot about the war in Cryptonomicon which is not generally
>> known, such as the idea of Churchill and Roosvelt (rose field?)
>> communicating via. telephone, with a record hiding the words in White
>> Noise.
>
> There was an article in the IEEE Spectrum about that - and the story is a bit
> more complicated. Phonograph records contained a one-time key that digitally
> enciphered the speech, which had gone through an early vacuum-tube vocoder.
>
Early voice scrambling was simply shifting the voice to another frequency 
via a mixer and an oscillator.  But since it was a single and constant 
tone, it was relatively easy to decode.  But if you use a radio station or 
a record instead of the oscillator, the shifting is constantly changing, 
and the only chance you have is if you stumble on the record or radio 
station, and things sync up time wise.

It's not unlike frequency hopping that's now used to make efficient use of 
radio spectrum, but also adds some level of encryption.  Unless you know 
the sequence of shifting, you'll never decode the signal.

   Michael

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Re: seveneves Mike Spencer <mds@bogus.nodomain.nowhere> - 2015-08-24 01:44 -0300
  Re: seveneves Morten Reistad <first@last.name.invalid> - 2015-08-24 10:35 +0200
    Re: seveneves Greymaus <mausg@mail.com> - 2015-08-24 09:26 +0000
      Re: seveneves Ahem A Rivet's Shot <steveo@eircom.net> - 2015-08-24 14:11 +0100
        Re: seveneves jmfbahciv <See.above@aol.com> - 2015-08-25 12:42 +0000
          Re: seveneves simon@twoplaces.co.uk (Simon Turner) - 2015-08-26 11:11 +0100
            Re: seveneves jmfbahciv <See.above@aol.com> - 2015-08-26 12:03 +0000
              Re: seveneves simon@twoplaces.co.uk (Simon Turner) - 2015-08-27 10:09 +0100
                Re: seveneves jmfbahciv <See.above@aol.com> - 2015-08-27 13:40 +0000
                Re: seveneves simon@twoplaces.co.uk (Simon Turner) - 2015-08-28 11:52 +0100
                Re: seveneves jmfbahciv <See.above@aol.com> - 2015-08-28 13:31 +0000
                Re: seveneves simon@twoplaces.co.uk (Simon Turner) - 2015-09-03 10:25 +0100
                Re: seveneves Huge <Huge@nowhere.much.invalid> - 2015-09-03 09:36 +0000
                Re: seveneves mausg@mail.com - 2015-09-03 10:17 +0000
                Re: seveneves Huge <Huge@nowhere.much.invalid> - 2015-09-03 13:04 +0000
                Re: seveneves simon@twoplaces.co.uk (Simon Turner) - 2015-09-04 07:47 +0100
                Re: seveneves Huge <Huge@nowhere.much.invalid> - 2015-09-04 09:02 +0000
                Re: seveneves Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-09-11 07:33 +0000
                Re: seveneves simon@twoplaces.co.uk (Simon Turner) - 2015-09-04 07:45 +0100
                Re: seveneves Huge <Huge@nowhere.much.invalid> - 2015-09-04 08:59 +0000
                Re: seveneves Greymaus <mausg@mail.com> - 2015-08-28 14:23 +0000
      Re: seveneves Mike Spencer <mds@bogus.nodomain.nowhere> - 2015-08-24 14:50 -0300
        Re: seveneves Greymaus <mausg@mail.com> - 2015-08-24 19:48 +0000
          Re: seveneves Huge <Huge@nowhere.much.invalid> - 2015-08-24 20:42 +0000
            Re: seveneves Mike Spencer <mds@bogus.nodomain.nowhere> - 2015-08-25 02:17 -0300
            Re: seveneves Greymaus <mausg@mail.com> - 2015-08-25 08:54 +0000
    Re: seveneves scott@slp53.sl.home (Scott Lurndal) - 2015-08-24 14:07 +0000
      Re: seveneves Greymaus <mausg@mail.com> - 2015-08-24 19:31 +0000
        Re: seveneves scott@slp53.sl.home (Scott Lurndal) - 2015-08-24 19:54 +0000
    Re: seveneves JimP <solosam90@gmail.com> - 2015-08-24 10:27 -0500
  Re: seveneves Greymaus <mausg@mail.com> - 2015-08-24 09:22 +0000
    Re: seveneves "Charles Richmond" <numerist@aquaporin4.com> - 2015-08-25 16:22 -0500
      Re: seveneves Greymaus <mausg@mail.com> - 2015-08-26 07:52 +0000
        Re: seveneves Ahem A Rivet's Shot <steveo@eircom.net> - 2015-08-26 09:30 +0100
          Re: seveneves Huge <Huge@nowhere.much.invalid> - 2015-08-26 10:12 +0000
            Re: seveneves Ahem A Rivet's Shot <steveo@eircom.net> - 2015-08-26 12:42 +0100
              Re: seveneves Huge <Huge@nowhere.much.invalid> - 2015-08-26 12:15 +0000
              Re: seveneves lawrence@cluon.com - 2015-08-26 16:52 +0200
              Re: seveneves jmfbahciv <See.above@aol.com> - 2015-08-27 13:40 +0000
                Re: seveneves "Rod Speed" <rod.speed.aaa@gmail.com> - 2015-08-28 05:21 +1000
            Re: seveneves Andrew Swallow <am.swallow@btinternet.com> - 2015-08-26 13:59 +0100
              Re: seveneves Huge <Huge@nowhere.much.invalid> - 2015-08-26 13:20 +0000
                Re: seveneves Ahem A Rivet's Shot <steveo@eircom.net> - 2015-08-26 14:54 +0100
                Re: seveneves Huge <Huge@nowhere.much.invalid> - 2015-08-26 14:37 +0000
              Re: seveneves Peter Flass <peter_flass@yahoo.com> - 2015-08-26 16:08 +0000
        Re: seveneves Anne & Lynn Wheeler <lynn@garlic.com> - 2015-08-26 07:10 -0700
          Re: seveneves Anne & Lynn Wheeler <lynn@garlic.com> - 2015-08-26 07:54 -0700
          Re: seveneves Anne & Lynn Wheeler <lynn@garlic.com> - 2015-08-26 08:10 -0700
            Re: seveneves Greymaus <mausg@mail.com> - 2015-08-26 17:15 +0000
              Re: seveneves Anne & Lynn Wheeler <lynn@garlic.com> - 2015-08-26 11:57 -0700
                Re: seveneves Anne & Lynn Wheeler <lynn@garlic.com> - 2015-08-26 12:25 -0700
          Re: seveneves Anne & Lynn Wheeler <lynn@garlic.com> - 2015-08-27 16:05 -0700
  Re: seveneves "Charles Richmond" <numerist@aquaporin4.com> - 2015-08-25 16:18 -0500
    Re: seveneves Michael Black <et472@ncf.ca> - 2015-08-26 02:09 -0400
      Re: seveneves simon@twoplaces.co.uk (Simon Turner) - 2015-08-27 08:42 +0100
        Re: seveneves Bob Eager <news0005@eager.cx> - 2015-08-27 09:18 +0000
          Re: seveneves simon@twoplaces.co.uk (Simon Turner) - 2015-08-27 14:30 +0100
            Re: seveneves Joy Beeson <jbeeson@invalid.net.invalid> - 2015-08-27 23:39 -0300
              Re: seveneves jmfbahciv <See.above@aol.com> - 2015-08-28 13:31 +0000
              Re: seveneves Michael Black <et472@ncf.ca> - 2015-08-28 11:45 -0400
                Re: seveneves Dan Espen <despen@verizon.net> - 2015-08-28 12:15 -0400
                Re: seveneves Michael Black <et472@ncf.ca> - 2015-08-28 13:09 -0400
        Re: seveneves Greymaus <mausg@mail.com> - 2015-08-27 20:20 +0000
          Re: seveneves Quadibloc <jsavard@ecn.ab.ca> - 2015-08-28 20:41 -0700
            Re: seveneves Michael Black <et472@ncf.ca> - 2015-08-29 09:32 -0400
  Re: seveneves Jorgen Grahn <grahn+nntp@snipabacken.se> - 2015-08-26 16:26 +0000

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